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One is on a switch, the other has the pull cord. Check the bulbs in both fans. Both are new and only been installed for a few months.
I think it might be the cord assembly itself. When I pull it, it doesn't have the same resistance as the fan cord, and it doesn't have as much of a "click" as the fan cord. Where can I get that from?

And got the following answer:

with the power off look inside the socket and you will see a pin. 1 in each socket, pull the pins out a little bit and screw your bulb back in and see what happens, sometimes when you screw a bulb in real tight it pushes that pin in to far back and it loses contact with the bulb. If that doesn't work make sure you have power at the socket, if no power check the splice in the fan and make sure everything is tight. If that is tight then there is something wrong with the lighting kit.

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